Figure 1. (Color online) The Van der Waals model. (a) Iso-density lines for the classic van der Waals gas: 10, 20, 30… 710 kg/m3-labelled at right and upper axes, A, B, B’, C, chosen special points on the PT plane: A(1,300), B(96.3, 1400), B’(300, 1380), C(700, 300); 1, classic Joule-Thomson inversion curve (K = 8/3) , 2, Joule-Thomson inversion curve at K = 3.42 (air), 3, approximate Joule-Thomson inversion curve built by , Ĉ, critical point, S, triple point, SS’, line of solid-liquid equilibrium, ĈS, line of vapour-liquid equilibrium; dark gray rectangular, two-phase unstable zone; bold line connecting point C and the unstable zone corresponds to isochoric heating of liquid air. (b) Calculated P-T diagram for internal energy of compressed air. Parameter K = 3.42; isoenergetic curves: Us = 0.05·(s-1), s = 1, 2.15, max{U}<1.1 MJ/kg; UA = 0.217 MJ/kg, UB = 1.011 MJ/kg, special energy of prepared fuel at the initial point of adiabatic expansion, UB’ = 0.989 MJ/kg, special energy of preliminary prepared fuel, UC = 0.148 MJ/kg, special energy of fuel in tank.

From

Linde-Hampson Anti-Machine: Self-heated Compressed Van-Der-Waals Gas as an Energy Carrier for Pneumatic Vehicles

E.Ya. Glushko

American Journal of Energy Research. 2013, 1(3), 59-67 doi:10.12691/ajer-1-3-4